Enabling direct kinetic simulation of dense plasma plume expansion for laser ablation plasma thrusters
نویسندگان
چکیده
Abstract Laser ablation plasma thrusters are an emerging space propulsion concept that provides promise for lightweight payload delivery. Predicting the lifetime and performance of these hinges on a comprehensive characterization expansion dynamics ablated plume. While state-of-the-art techniques simulating plasmas often particle-based, grid-based direct kinetic solver confers advantages in such transient inhomogeneous problem by eliminating statistical noise. A including interparticle collisions is employed plume model spanning one dimension each configuration velocity space. The high degree thermodynamic nonequilibrium inherent characterized, justifying need rather than hybrid or fluid solver. Thruster-relevant metrics as momentum flux also computed. observed to be highly with insufficient time thermalization region preceding front, theoretical possibility reducing local grid resolution up two orders magnitude at far end domain established. These grid-point requirements verified via employment nonuniform grids various ratios, several which employ coarsening Longer lengths explored characterize thruster-scale phenomena larger ambient pressures simulated testbed probe facility effects due background particles.
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ژورنال
عنوان ژورنال: Journal of Electric Propulsion
سال: 2022
ISSN: ['2731-4596']
DOI: https://doi.org/10.1007/s44205-022-00030-x